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10.Reconnect the front audio and USB assembly cables to the front audio connector and the front USB
connector on the system board. See “Locating parts on the system board” on page 9.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 32.
Replacing the system fan
Attention:
Do not open your computer or attempt any repair before reading and understanding the “Important safety information”
in the ThinkCentre Safety and Warranty Guide that came with your computer. To obtain a copy of the ThinkCentre
Safety and Warranty Guide, go to:
http://www.lenovo.com/support
This section provides instructions on how to replace the system fan.
To replace the system fan, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Open the computer cover. See “Opening the computer cover” on page 12.
3. Remove the front bezel by releasing the three plastic tabs and pivoting the front bezel outward.
Figure 26. Removing the front bezel
4. Pivot the optical drive bay assembly upward. See “Accessing the system board components and drives”
on page 12.
5. Locate the system fan. See “Locating components” on page 8.
6. Disconnect the system fan cable from the microprocessor fan connector on the system board. See
“Locating parts on the system board” on page 9.
7. Release the four tabs on the bottom of the system fan as shown, and then lift the system fan straight up
to completely remove it from the chassis.
Chapter 2. Installing or replacing hardware 27